Michael D. Walker
Psychiatric Nurse Practitioners (Psychiatric/Mental Health Nurse Practitioner)
At a glance
- Years since graduation
- 5
- In the NPI registry since
- 2020
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. What an NPI is
Education and training
- 2020Registered with an NPI (national billing number; not a license date)
Medicare’s Care Compare data doesn’t list this clinician’s medical school. Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Psychiatric/Mental Health Nurse Practitioner primary
TN license 30068 -
Psychiatric/Mental Health Registered Nurse
TN license RN207379 -
Registered Nurse
TN license 0000207379
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Medical groups
- Behavioral Medicine Institute PC (21 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Lamotrigine Other prescribers in Knoxville, TN | 236 |
| Aripiprazole Other prescribers in Knoxville, TN | 176 |
| Trazodone Hcl Other prescribers in Knoxville, TN | 167 |
| Quetiapine Fumarate Other prescribers in Knoxville, TN | 167 |
| Bupropion Xl (bupropion hcl) Other prescribers in Knoxville, TN | 146 |
| Buspirone Hcl Other prescribers in Knoxville, TN | 139 |
| Clonazepam Other prescribers in Knoxville, TN | 125 |
| Olanzapine Other prescribers in Knoxville, TN | 109 |
| Sertraline Hcl Other prescribers in Knoxville, TN | 103 |
| Vraylar (cariprazine hcl) Other prescribers in Knoxville, TN | 98 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 6 companies reported 16 payments worth $415 in total to this clinician.
| Iti, Inc. (d/b/a Intra-cellular Therapies, Inc.) | $139 |
|---|---|
| Vanda Pharmaceuticals Inc. | $86.47 |
| E.r. Squibb & Sons, L.l.c. | $80.47 |
| AbbVie Inc. | $76.55 |
| Axsome Therapeutics, Inc. | $15.96 |
| Collegium Pharmaceutical, Inc. | $15.81 |
| Food and Beverage | $406 |
|---|---|
| Education | $8.55 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Iti, Inc. (d/b/a Intra-cellular Therapies, Inc.) Mar 24, 2025 | Education CAPLYTA · PSYCHIATRY · in-kind | $8.55 |
Each payment as the company reported it, with the products it named. Meals are counted in the totals above but not listed one by one.
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.